• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

rear brake sudden lock up

  • Thread starter Thread starter BentRod
  • Start date Start date
B

BentRod

Guest
the rear drum brake on my 81 gsx400 locked up on me this morning, causing me to go down. When I pressed the brake peddle it did not engage the rear brake when it normally would have. Instead the rear brake activated suddenly as I continued to press the brake peddle, and when it did engage it braked very hard.

What is wrong with my drum brake?

thanks
BentRod​
 
Hope ya didnt go down too hard.....

I didnt see a 400 in Bikebandits parts diagrams, only 450s. Youll have to take it apart. Could have had a brake lining come loose and jamb it up.
 
The adjustment nut on drum brakes has a curved sleeve that pushes on the linkage. If that is not seated fully when you adjust the linkage, it can move on its own, and could conceiveably cause strange things to happen. However, I do not see the probability of it jumping on its own to the point where it will cause the brakes to lock up. It would more likely release them suddenly when you have them applied. Consider bonanzadave's suggestion that there might be a loose lining inside.

.
 
Recently was working on a GS(X)400 twin with drum brakes. Found that the inner part of the drum was not circular so the shoes only touched at part of the revolution.

Suzuki mad
 
I was applying the brakes at the time.
the road was wet and oily, hence I lowsided the bike

rear brake is same on 400 as 450
 
Last edited:
I would check & make sure the pedal moves freely- no rust on the pivot
Brake torque arm- still hooked up. Next is to dissemble it...
 
BDave is right. The only way to know for sure is to expose the brake unit. One possibility is a lining so badly worn or a bent shoe such that when the leading shoe (if it is a leading shoe unit) gets close to the drum, it just jams into place instead of progressively increasing friction.
 
You must log in or register to reply here.
Back
Top